Buggy code:
@ UsesConfiguration ( DocumentGraphParser . class ) public abstract class PropertyHyperGraphBuilder < T > extends AbstractGraphBuilder < T , EntityQuery > implements HyperGraphBuilder < T > { protected Collection < DocumentGraphParser > singletons ; private static final boolean INHERIT_ATTRIBUTES = true ; @ Inject protected StopWordService stopwordService ; @ Inject protected StyleService style ; @ Inject private Logger logger ; protected ArrayList < String > skipInheritanceTypes ; @ Inject @ Symbol ( G_SymbolConstants . ENABLE_GRAPH_QUERY_PATH ) private boolean enableGraphQueryPath ; public PropertyHyperGraphBuilder ( ) { } public PropertyHyperGraphBuilder ( final Collection < DocumentGraphParser > singletons ) { } public void addGraphQueryPath ( final V_GenericNode reportNode , final EntityQuery q ) { } @ Override public V_GenericNode createOrUpdateNode ( final double minimumScoreRequired , final double inheritedScore , final double localPriority , final String originalId , final String idType , final String nodeType , final V_GenericNode attachTo , final String relationType , final String relationValue , final double nodeCertainty ) { } @ Override public V_GenericNode createOrUpdateNode ( final String originalId , final String idType , final String nodeType , final V_GenericNode attachTo , final String relationType , final String relationValue ) { } public V_GenericNode createOrUpdateNode ( final String originalId , final String idType , final String nodeType , final V_GenericNode attachTo , final String relationType , final String relationValue , final double certainty ) { } @ Override public abstract GenericDAO < T , EntityQuery > getDAO ( ) { } public void inheritLabelIfNeeded ( final V_GenericNode a , final V_GenericNode ... nodes ) { } @ Override public V_GenericGraph makeGraphResponse ( final V_GraphQuery graphQuery ) throws Exception { nodeList = new V_NodeList ( ) ; edgeMap = new HashMap < String , V_GenericEdge > ( ) ; edgeList = new mil . darpa . vande . generic . V_EdgeList ( graphQuery ) ; scannedQueries = new HashSet < String > ( ) ; queriesToRun = new PriorityQueue < EntityQuery > ( 10 , new ScoreComparator ( ) ) ; V_NodeList savNodeList = new V_NodeList ( ) ; if ( ( graphQuery . getMaxHops ( ) ) <= 0 ) { return new V_GenericGraph ( ) ; } else { logger . debug ( ( "Attempting<seq2seq4repair_space>a<seq2seq4repair_space>graph<seq2seq4repair_space>for<seq2seq4repair_space>query<seq2seq4repair_space>" + ( graphQuery . toString ( ) ) ) ) ; } int intStatus = 0 ; String strStatus = "Graph<seq2seq4repair_space>Loaded" ; EntityQuery eq = new EntityQuery ( ) ; final G_IdType nodeType = nodeTypeAccess . getCommonNodeType ( ANY ) ; for ( final String id : graphQuery . getSearchIds ( ) ) { eq . addAttribute ( new graphene . model . idl . G_SearchTuple < String > ( G_SearchType . COMPARE_EQUALS , nodeType , id ) ) ; } queriesToRun . add ( eq ) ; Map < String , V_GenericEdge > saveEdgeMap = new HashMap < String , V_GenericEdge > ( ) ; int currentDegree = 0 ; for ( currentDegree = 0 ; ( currentDegree < ( graphQuery . getMaxHops ( ) ) ) && ( ( nodeList . getNodes ( ) . size ( ) ) < ( graphQuery . getMaxNodes ( ) ) ) ; currentDegree ++ ) { eq = null ; logger . debug ( ( ( "$$$$There<seq2seq4repair_space>are<seq2seq4repair_space>" + ( queriesToRun . size ( ) ) ) + "<seq2seq4repair_space>queries<seq2seq4repair_space>to<seq2seq4repair_space>run<seq2seq4repair_space>in<seq2seq4repair_space>the<seq2seq4repair_space>current<seq2seq4repair_space>degree." ) ) ; while ( ( ( ( queriesToRun . size ( ) ) > 0 ) && ( ( eq = queriesToRun . poll ( ) ) != null ) ) && ( ( nodeList . getNodes ( ) . size ( ) ) < ( graphQuery . getMaxNodes ( ) ) ) ) { if ( ( ValidationUtils . isValid ( eq . getAttributeList ( ) ) ) && ( ValidationUtils . isValid ( eq . getAttributeList ( ) . get ( 0 ) . getValue ( ) ) ) ) { savNodeList = nodeList . clone ( ) ; logger . debug ( ( "Processing<seq2seq4repair_space>degree<seq2seq4repair_space>" + currentDegree ) ) ; logger . debug ( ( "1111=====Running<seq2seq4repair_space>query<seq2seq4repair_space>" + ( eq . toString ( ) ) ) ) ; getDAO ( ) . performCallback ( 0 , 0 , this , eq ) ; logger . debug ( ( ( ( ( "3333====After<seq2seq4repair_space>running<seq2seq4repair_space>" + ( eq . toString ( ) ) ) + ",<seq2seq4repair_space>there<seq2seq4repair_space>are<seq2seq4repair_space>" ) + ( queriesToRunNextDegree . size ( ) ) ) + "<seq2seq4repair_space>queries<seq2seq4repair_space>to<seq2seq4repair_space>run<seq2seq4repair_space>in<seq2seq4repair_space>the<seq2seq4repair_space>next<seq2seq4repair_space>degree." ) ) ; try { } catch ( final Exception e ) { <START_BUG> logger . error ( e . getMessage ( ) ) ; <END_BUG> } } } logger . debug ( ( ( ( ( ( ( "4444====<seq2seq4repair_space>At<seq2seq4repair_space>the<seq2seq4repair_space>end<seq2seq4repair_space>of<seq2seq4repair_space>degree<seq2seq4repair_space>" + currentDegree ) + ",<seq2seq4repair_space>there<seq2seq4repair_space>are<seq2seq4repair_space>" ) + ( nodeList . size ( ) ) ) + "<seq2seq4repair_space>nodes<seq2seq4repair_space>and<seq2seq4repair_space>" ) + ( edgeMap . size ( ) ) ) + "<seq2seq4repair_space>edges" ) ) ; saveEdgeMap = new HashMap < String , V_GenericEdge > ( edgeMap ) ; logger . debug ( ( ( "5555====There<seq2seq4repair_space>are<seq2seq4repair_space>" + ( queriesToRunNextDegree . size ( ) ) ) + "<seq2seq4repair_space>queries<seq2seq4repair_space>to<seq2seq4repair_space>run<seq2seq4repair_space>in<seq2seq4repair_space>the<seq2seq4repair_space>next<seq2seq4repair_space>degree." ) ) ; queriesToRun . addAll ( queriesToRunNextDegree ) ; queriesToRunNextDegree . clear ( ) ; } if ( ( nodeList . getNodes ( ) . size ( ) ) > ( graphQuery . getMaxNodes ( ) ) ) { nodeList = savNodeList ; edgeMap = saveEdgeMap ; intStatus = 1 ; strStatus = ( "Returning<seq2seq4repair_space>only<seq2seq4repair_space>" + currentDegree ) + "<seq2seq4repair_space>hops,<seq2seq4repair_space>as<seq2seq4repair_space>maximum<seq2seq4repair_space>nodes<seq2seq4repair_space>you<seq2seq4repair_space>requested<seq2seq4repair_space>would<seq2seq4repair_space>be<seq2seq4repair_space>exceeded" ; } else { intStatus = 1 ; strStatus = ( ( ( "Returning<seq2seq4repair_space>" + ( nodeList . getNodes ( ) . size ( ) ) ) + "<seq2seq4repair_space>nodes<seq2seq4repair_space>and<seq2seq4repair_space>" ) + ( edgeMap . size ( ) ) ) + "<seq2seq4repair_space>edges." ; } for ( final V_GenericEdge e : edgeMap . values ( ) ) { edgeList . addEdge ( e ) ; } performPostProcess ( graphQuery ) ; final V_GenericGraph g = new V_GenericGraph ( nodeList . getNodes ( ) , edgeList . getEdges ( ) ) ; g . setIntStatus ( intStatus ) ; g . setStrStatus ( strStatus ) ;

Fix:
logger . error ( ( "makeGraphResponse<seq2seq4repair_space>" + ( e . getMessage ( ) ) ) ) ;